F-124-A
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BrandFederal
ClassPower Triode
Construction
Primary TypeTriode
EnvelopeGlass and water-cooled anode
Sections1
Filament / Heater
MaterialPure Tungsten
Absolute Maximum Ratings
Plate Voltage20000 V
Plate Dissipation40000 W
Grid 1 Voltage-3000 V
Cathode Current35000 mA
Audio Performance
Power Output39000 W
Key Features
- Water-cooled anode
- Pure tungsten multi-strand filament
- Dual grid terminal
- Operative up to 20 Mc
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class B Modulator (2 tubes) | 10000V | - | - | 40.5 | 6000mA |
| Class B RF Amplifier (Carrier) | 17500V | - | - | 40.5 | 2100mA |
| Class C Telegraphy | 18000V | - | - | 40.5 | 6000mA |
| Class C Telephony (Plate-Modulated) | 12000V | - | - | 40.5 | 3310mA |
Application Notes
Designed for use as radio-frequency amplifier, oscillator, or Class B modulator. For many years broadcast stations have used this for 50 kilowatt transmitters.
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